body {
    /* background: #f2f2f2; */
    background: #282c34;
}

.frame {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 400px;
    height: 400px;
    margin-top: -200px;
    margin-left: -200px;
    border-radius: 2px;
    box-shadow: 1px 2px 10px 0px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    background: #3498db;
    color: #fff;
    font-family: 'Open Sans', Helvetica, sans-serif;
}

.button {
    position: absolute;
    width: 200px;
    height: 60px;
    background: #fff;
    color: #34495e;
    left: 100px;
    font-size: 18px;
    line-height: 58px;
    font-weight: 400;
    text-align: center;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease-in-out;

    &:hover {
        --depth: 1;
        box-shadow: 0 0 calc(var(--depth) * 8px) 0 rgba(0, 0, 0, 0.2),
            calc(var(--depth) * 2px) calc(var(--depth) * 4px)
                calc(var(--depth) * 4px) 0 rgba(0, 0, 0, 0.25);
    }
}

.button-1 {
    top: 80px;
    &:hover {
        transform: scale(1.03);
        --depth: 1;
    }
}
.button-2 {
    top: 170px;
    &:hover {
        transform: scale(1.04);
        --depth: 2;
    }
}
.button-3 {
    top: 260px;
    &:hover {
        transform: scale(1.05);
        --depth: 3;
    }
}
